[studio] Complete editor uploads and queued cloud builds (#135)

* [studio] Complete editor uploads and queued cloud builds

* [studio] Protect unpublished source and remove unused notification RPC

apps/studio/migrations/0003_studio_cloud_build_job.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS studio_cloud_build_job (
+ cloud_build_id TEXT PRIMARY KEY,
+ payload TEXT NOT NULL,
+ status TEXT NOT NULL DEFAULT 'queued',
+ lease_token TEXT,
+ lease_until TEXT,
+ attempts INTEGER NOT NULL DEFAULT 0,
+ created_at TEXT NOT NULL
+);
+CREATE INDEX IF NOT EXISTS idx_studio_build_job_queue ON studio_cloud_build_job(status, created_at);